ASTROSAT CZTI

Data Quality Report

Orbit 34856

Creation date: 2022-03-10T06:03:48.184435
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1C07_005T01_9000004992_34856cztM0_level2.evt modeM0/AS1C07_005T01_9000004992_34856cztM0_level2_quad_clean.evt
Size (bytes)675,106,56077,391,360
Size643.8 MB 73.8 MB
Events in quadrant A7,162,376489,577
Events in quadrant B4,929,620512,980
Events in quadrant C3,418,609512,940
Events in quadrant D4,606,173484,469

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0247633
B0178492
C0130152
D0171852

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980
B0980
C0980
D0980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A489490218.430732%
B489487517.879036%
C48941893.861872%
D48942595.292195%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 6956 4895 789 789 11.34% 16.12%
B 6956 4895 663 663 9.53% 13.54%
C 6956 4895 175 175 2.52% 3.58%
D 6956 4895 282 282 4.05% 5.76%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 15 169 4845328 41723.77 584 575 116.1
A 10 83 45576 387.55 584 575 116.1
A 13 6 8696 69.94 584 575 116.1
B 5 172 682466 6345.99 580 569 107.5
B 5 14 567635 5277.33 580 569 107.5
B 5 31 566548 5267.21 580 569 107.5
C 0 207 628045 4717.97 587 593 133.0
C 0 10 239732 1798.15 587 593 133.0
C 15 214 220735 1655.3 587 593 133.0
D 12 227 1007312 7199.46 584 568 139.8
D 1 52 661148 4723.96 584 568 139.8
D 8 195 386256 2758.14 584 568 139.8

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter